# Airworthiness Directives; General Electric Company CF34-3A1, -3B, and -3B1 Turbofan Engines
> **Rule** · Final rule. · Published 2003-10-14 · Effective 2003-11-18 · 68 FR 59104
## Document
- **Document number:** 03-25864
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 68 FR 59104
- **Publication date:** 2003-10-14
- **Effective date:** 2003-11-18
- **FAA docket:** Docket No. 2001-NE-21-AD
## Abstract

This amendment revises an existing airworthiness directive (AD), that applies to General Electric Company (GE) CF34-3A1, -3B, and -3B1 turbofan engines with scavenge screens part numbers (P/Ns) 4047T95P01 and 5054T86G02 installed in the B-sump oil scavenge system. That AD currently requires initial and repetitive visual inspections and cleaning of the B-sump scavenge screens until a screenless fitting is installed. This amendment requires the same initial and repetitive visual inspections and cleaning of the B-sump scavenge screens until a screenless fitting is installed. This amendment also corrects a typographical error, and introduces a less restrictive terminating action schedule. This amendment is prompted by the need to correct a typographical error and by the need to introduce a less restrictive terminating action schedule. We are issuing this AD to prevent B-sump scavenge screen blockage due to coking which could result in ignition of B-sump oil in the secondary air system, fan drive shaft separation, and uncontained engine failure.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/10/14/03-25864/airworthiness-directives-general-electric-company-cf34-3a1--3b-and--3b1-turbofan-engines)
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